In university today, my lecturer called me out in front of 200+ people asking whether I really know who Che is, or what he believed in, or if I just have the sticker because it's popular. Never noticed the similarity before and now I can't unsee it.

Probably not the most controversial but I think a lot of well-known, well-respected brands have a lot of sketchy development processes which are kept fairly quiet, and would be very controversial if they came to light.